Typographical machine



S. C. NIELSEN.

TYPOGRAPHICAL MACHINE. APPLICATION FILED JUNE 7, 191a.

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UNETE SFATES FATENT QFHQO sIeURn o. NIELSEN, or BROOKLYN, NEW YORK, AssIe OR T0 MERGENTHALER NO- TYPE COMPANY, A CORPORATION OF NEWYORK.

TYPOGRAPHICAL MACHINE.

1 0 aZZ whom it may concern Be it known that I, SIGURD C. NIELSEN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Typographical Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to an improvement in the keyboard mechanism used in commercial linotype machines of the present day, represented for instance in the U. S. Letters Patent granted to P, '1. Dodge, No. 530,931. This'mechanism includes certain cams mounted in and serving to lift pivotally mounted yokes or levers which actuate the matrix releasing devices, these yokes being normally supported in an inoperative position by underlying dogs with the cams held free of an underlying constantly operating driving roll and the said dogs being controlled by the finger keys of the keyboard so asto release the yokes and permit the cams to drop into engagement with and be operated by the operating roll and thereby actuate the matrix releasing clevices.

The present invention is concerned particularly with the form and construction of the yokes in which the cams are mounted, the object of the invention being to produce a yoke which will be light, strong and stiff, may be economically manufactured in standardized form, and will be effective and durable in operation. With these ends in view my invention consists of a cam yoke constructed of sheet metal, and formed from a sheet metal blank or plate suitably slotted and bent, in the manner to be described in the specification to follow, to give it the proper form and to admit of the mounting of the cam thereon.

In the accompanying drawing:

Figure 1 is a cross section of the keyboard mechanism with my improvement incorporated therein.

Fig. 2 is a top plan view of the sheet metal blank from which the yoke is made.

Fig. 3 is a top plan view of the yoke formed by bending and shaping the blank shown in the preceding figure.

Fig. 4 is a longitudinal section on the line e-l of Fig. 3.

Specification of Letters Patent.

Patented Aug. 9, 1921.

Application filed June 7, 1918. Serial No. 238,748.

Fig. 5 is a cross section on the line 55 of Fig. 4:.

Fig. 6 is a perspective view of the yoke.

Fig. 7 is a horizontal section on the line 77 of Fig. 1.

Referring to the drawing:

Referring particularly to Fig. 1, A represents the main frame and B one of the vertically reciprocating reeds or bars urged constantly downward by a spring (not shown), and operating when lifted to actuate one of the escapement mechanisms and release the matrices one at a time. Each of these bars terminates at its lower end over one end' of a vertically vibrating yoke or lever C, guided at this end in a slot in a vertical comb plate D fixed to the machine frame, and ivoted at its opposite end on a horizontal Xed pivot pin E, which yoke serves to lift the associated reed or bar B. Each yoke carries, in a central slot, a cam F turning on a horizontal pivot pin on the yoke, there being in the present instance two series of these yokes side by side across the width of the machine, and under each series there is a constantly rotating operating roll G.

Each yoke is held in normally elevated position by a dog or pawl H so that its cam, held against rotation by a stoppin h, is also prevented from engaging the roll. When the dog is tripped through the finger key connections I, K, the yoke C falls until its cam F contacts with the roll thereunder, whereupon the cam is caused to rotate and elevate the yoke above its normal position to actuate the reed B. The above parts, so far as described, are constructed and arranged to operate as in the Dodge patent referred to.

My invention has to do with the form and construction of the individual cam yokes or levers C, which in accordance with my invention are constructed of sheet metal. In the example here shown, the yokes are each formed from a sheet metal blank 0 of the form and contour shown in Fig. 2, where it will be seen that the flat blank is provided with a central longitudinal slot '0', with a terminal finger 0 at one end, and with a terminal tongue 0 at the opposite end, the slot, tongue and finger being preferably in longitudinal alinement with each other. The marginal portions 0 of the blank at the sides of the slot are bent toward each other at right angles to the plane of the blank (Fig. 3) thereby forming two opposed bent flanges which extend parallel to each other. These opposed flanges form between them a vertical channel which communicates with the slot 0, the cam E being rotatably mounted between and supported by the flanges on the pivot pin N, and extending into the slot 0. w y r The terminal finger 0 of the blank is bent transversely on itself, as shown in Figs. 4c

and 5, thereby forming a loop 0 constituting in effect a guiding and reed-enga'glng member, which in the operation of the yoke,

l the form of a hook 0 by which the yoke is pivotally sustained. by the pivot pin E before alluded to.

The construction above described forms in effect two opposing spaced flanges whose lower edges at opposite ends are connected together by fiat portionsof the blank, which portions are spaced from each other and lie in a common plane and constitute the end walls of the slot 0 whose side walls are formed by the two flanges, the ends of which fianges above the connecting portions are free and disconnected from each other, the

hook a forming a continuation of one of the flat connecting portions, and the loop a forming a continuation of the other connecting portion and having its inner end dis- 5 posed between the free disconnected adj acent ends of the flanges.

- My improved sheet metal yoke, having the structural features and characteristics above set forth, possesses many advantages over those of the prior art which were made from a solid block slotted and shaped at its ends; among which advantages are great strength and stiffness in proportion to theweight, economy in manufacture due to the ability to produce the yokes speedily and in large quantities by stamping and die pressing whereby they are standardized in form,

greater saving in material, durability in wear, and other advantages unnecessary to enumerate herein.

While in the foregoing description and accompanying drawings I have set forth my invention in the form which I prefer to adopt, it will be manifest to the skilled mechanic that the invention may be variously changed and modified without departing from the spirit of my invention; and further it will-be understood that the invention is not limited to any particular form or construction of the parts except in so far as such limitations are specified in the claim. Having thus described my invention, what 1 claim is: 7

As an article of manufacture, a skeletonized cam-yoke for key-board mechanisms comprising spaced side-walls arranged in parallelism; an open-sided guiding and reed-engaging finger integral therewith and outstanding beyond the ends of the side walls and having spaced-apart upper and lower comb-engaging portions occupying planes between the side-walls and connected by a vertical portion; an integral hook-' v shaped tongue projecting beyond the ends of the side-walls; two fiat connecting portions disposed between the sidewalls and to which the finger and tongue are, respectively, connected and being spaced by a longitudinal slot located between the sidewalls; and a, cam-member disposed between and sustained by the side-walls and movable in the slot, the periphery of the cam-member extending below the'plane of the connecting portions. 7 r V In testimony whereof, I have aflixed my signature hereto. 1

SIGURD C. NIELSEN. 

